Treatise on invertebrate paleontology
by Geological Society of America, Clark, David L., Robison, Richard A., Kaesler, Roger L., Callomon, John H., Howarth, Michael K., Moore, Raymond C., Hess, Hans, Messing, Charles G., Boardman, R. S., Bulman, O. M. B., Finks, Robert M., Furnish, William M., Hill, Dorothy, Reid, R. E. H., Rigby, J. Keith, Teichert, Curt, Williams, Alwyn, Wright, Claud William
Treatise on invertebrate paleontology: Mollusca 4 : Vol. 4: Cretaceous Ammonoidea
by Geological Society of America, Clark, David L., Robison, Richard A., Kaesler, Roger L., Callomon, John H., Howarth, Michael K., Moore, Raymond C., Hess, Hans, Messing, Charles G., Boardman, R. S., Bulman, O. M. B., Finks, Robert M., Furnish, William M., Hill, Dorothy, Reid, R. E. H., Rigby, J. Keith, Teichert, Curt, Williams, Alwyn, Wright, Claud William
Treatise on invertebrate paleontology
by Geological Society of America, Clark, David L., Robison, Richard A., Kaesler, Roger L., Callomon, John H., Howarth, Michael K., Moore, Raymond C., Hess, Hans, Messing, Charles G., Boardman, R. S., Bulman, O. M. B., Finks, Robert M., Furnish, William M., Hill, Dorothy, Reid, R. E. H., Rigby, J. Keith, Teichert, Curt, Williams, Alwyn, Wright, Claud William